getview

NullPointerException Warning on getView() inside onActivityCreated/onStart/onViewCreated method

由 时光毁灭记忆、已成空白 提交于 2019-12-06 19:54:48
问题 I know getView() might return null inside onCreateView() method, but even if I put the below code inside onActivityCreated() , onStart() or onViewCreated() methods, it still shows the warning about a possible NullPointerException in Android Studio (although my program runs without any issue). How to get rid of this warning? I am using Fragments. Code: datpurchased = (EditText) getView().findViewById(R.id.datepurchased); //datpurchased defined as instance variable in the class Warning: Method

NullPointerException Warning on getView() inside onActivityCreated/onStart/onViewCreated method

由 半腔热情 提交于 2019-12-05 01:45:45
I know getView() might return null inside onCreateView() method, but even if I put the below code inside onActivityCreated() , onStart() or onViewCreated() methods, it still shows the warning about a possible NullPointerException in Android Studio (although my program runs without any issue). How to get rid of this warning? I am using Fragments. Code: datpurchased = (EditText) getView().findViewById(R.id.datepurchased); //datpurchased defined as instance variable in the class Warning: Method invocation 'getView().findViewById(R.id.datepurchased)' may produce 'java.lang.NullPointerException'

Checkedtextview check/uncheck after scroll Listview

由 六月ゝ 毕业季﹏ 提交于 2019-12-04 05:12:09
问题 I'm developing checkedtextview in listvew using viewHolder and getview. To populate check/uncheck status binding from database is running well. But, if I check item and then scroll listview, it will back to uncheck. here is my customAdapter code. public class CustomAdapter extends ArrayAdapter<Model> { private Activity activity; int id; String autoid; ArrayList<Model> items; DatabaseHelper dbhelper = new DatabaseHelper(getContext()); public CustomAdapter(Activity context, int resource,

Android ListView with multiple layouts

由 送分小仙女□ 提交于 2019-12-04 03:56:06
问题 I have to show a list with different type of Views. So I have to define a ListView with an Adapter where I have to inflate multiple views. I have gone through example given, but problem is for my list is not symmetric like the example where header is repeated each time after 4 items. So I am facing problem with reuse of items in getView() public View getView(int position, View convertView, ViewGroup parent) { int type = getItemViewType(position); if (convertView == null) { holder = new

What is the difference between getView() and getActivity()?

由 左心房为你撑大大i 提交于 2019-12-01 17:50:20
What is the difference between getView() and getActivity() ? I have used both methods but don't understand the basic difference even methodology of usage are also same in android: ListView deliverItemList = (ListView) getView().findViewById(R.id.load_item_list); ListView deliverItemList = (ListView) getActivity().findViewById(R.id.load_item_list); I have assumed that getView() may produce NullPointerException , share your knowledge with me and which method is recommended? getActivity() returns the Activity hosting the Fragment , while getView() returns the view you inflated and returned by

What is the difference between getView() and getActivity()?

由 不羁岁月 提交于 2019-12-01 17:08:50
问题 What is the difference between getView() and getActivity() ? I have used both methods but don't understand the basic difference even methodology of usage are also same in android: ListView deliverItemList = (ListView) getView().findViewById(R.id.load_item_list); ListView deliverItemList = (ListView) getActivity().findViewById(R.id.load_item_list); I have assumed that getView() may produce NullPointerException , share your knowledge with me and which method is recommended? 回答1: getActivity()
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